123electric Smart BMS gen 3 Manual page 9

Step 5.
Step 6
Install a current sensor in the incoming power
line (solar panels, MPPT, charger etc.) and
connect this current sensor to the Begin Board
connector "Sensor 1". Install the second
current sensor in the power line of the
consumers (inverter, motor controller etc.)
and connect this sensor to the Begin Board
connector "Sensor 2".
Please make sure the current is flowing in the
right direction through the current sensor
hole. Check the correct flowing direction in
step 6. After the installation, check in the app
if the given currents are positive values.
For example when charging, you should see a
positive current number next to the solar
panel image.
123electric
The Netherlands
E-mail: info@123electric.eu
www.123electric.eu
Both current sensors can measure
bidirectional currents. It is also possible to
only use one current sensor instead of two.
This may be needed if you have a combined
inverter/charger with a shared power cable to
both inverter and charger. The BMS will work
fine with just one current sensor. The
drawback is that you cannot measure
incoming and outgoing currents
independently, but only see the current going
in or out the battery pack. When connecting
only one sensor, connect this to "Sensor 1" of
the Begin Board and make sure the charging
current follows the arrow direction as
indication in the images below.
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